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  <title>Debugging Regular Expressions</title>
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          <h2 class="title" style="clear: both"><a id="N10ADF" name="N10ADF"></a>Debugging Regular
          Expressions</h2>
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    <p>The Single Step feature allows for a step by step inspection of the regular expression.</p>

    <p>If no groups <code class="literal">(<span class="symbol">...</span>)</code> are defined by
    the user, the RegExp Plug-in tries to use logical blocks for matching, otherwise the already
    existing groups are used.</p>

    <p>The following buttons are provided:</p>

    <div class="itemizedlist">
      <ul type="disc">
        <li>
          <p><span class="inlinemediaobject"><img src="images/debug_stop.gif" /></span> Reset
          (clears all color markers)</p>
        </li>

        <li>
          <p><span class="inlinemediaobject"><img src="images/debug_forward.gif" /></span> Step
          forward</p>
        </li>

        <li>
          <p><span class="inlinemediaobject"><img src="images/debug_back.gif" /></span> Step
          backward</p>
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